[ubuntu] Compiz Blur on Intel 945 Mobile Video Card

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Hello,
I have a laptop with an Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) video card.
When I go to the CompizConfig Settings Manager -> Effects -> Blur Windows plugin and enable it, my computer comes to a screeching halt.
Is this due to limitations in the card? Or are there settings I can tweak to get Blur working?
Thanks!
(Hardware)